By joining you will help ensure that we can continue to provide this service
JOIN HERE!
R69 no spark
-
- Posts: 1298
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 21 times
- Been thanked: 21 times
Re: R69 no spark
R69S - R60/2 - R67/2 - R51/3 - R69
- therealkennyboy
- Posts: 93
- Joined: Sat Apr 02, 2022 5:44 pm
- Location: Scottsdale, Arizona
- Has thanked: 1 time
- Been thanked: 1 time
Re: R69 no spark
There should be a horizontal scribe line immediately above the letter S (older bikes had a small ball bearing, hard to miss)--it is this line which should be aligned with the small cut-out on the left side of the inspection hole (looking square into the hole), when the magneto mark is exactly aligned with the v-notch. Getting these spot on helps with kick-starting the bike (the lowest engine speed, and therefore the weakest spark).
Have you tried it with no plugs, and seeing if the coil jumps a spark across the safety gaps? Supposed to be 10mm gap, I believe.
If you're getting spark there, that would leave only the plug wire/cap/plug as culprits. If it doesn't even spark at the safety gap (with open plug caps), then the coil or the magneto rotor? But you state you have pretty much replaced all of these items at one time or another. You removed the #2 connection (gnd) at the switch plate--did you confirm at the other end (the magneto end) that it isn't shorted to ground somehow (independently of the key in/out), i.e. the wire itself is shorted to ground?
I've certainly had frustrating issues before, but this one would have me swearing out loud at the bike! I usually take a few days away from the struggle and try to come back at it fresh. Also, I try to limit it to one thing (one change) at a time, just to avoid any compounding mistakes. Although I must say, sounds like a pretty thorough investigation to me so far. Good luck!
Scottsdale, AZ, USA
1960 R60 (currently), 1974 R75/6 (past), 1981 R100CS (currently), 1984 R100RS (past), 1989 K100RS (past)
Re: R69 no spark
-
- Posts: 1298
- Joined: Wed Aug 05, 2009 9:06 pm
- Has thanked: 21 times
- Been thanked: 21 times
Re: R69 no spark
R69S - R60/2 - R67/2 - R51/3 - R69
- therealkennyboy
- Posts: 93
- Joined: Sat Apr 02, 2022 5:44 pm
- Location: Scottsdale, Arizona
- Has thanked: 1 time
- Been thanked: 1 time
Re: R69 no spark
If it is open circuit (which is what you want), your coil is (likely) okay. Did you replace the original coil because you knew it was problematic (hard starts when hot), or did you shotgun it as part of this whole repair activity?
What about continuity from the points to the coil? An open circuit there means the points closing doesn't collapse the field and no spark is produced. If the magnetized rotor is moving past the coil, a current is being generated. Take a good look at the other repairs you did, and see if it is possible that one of those actions somehow is contributing to the problem.
Frustrating for sure.
Scottsdale, AZ, USA
1960 R60 (currently), 1974 R75/6 (past), 1981 R100CS (currently), 1984 R100RS (past), 1989 K100RS (past)
Re: R69 no spark
- schrader7032
- Posts: 9057
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
- Been thanked: 36 times
Re: R69 no spark
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: R69 no spark
- wa1nca
- Posts: 1234
- Joined: Thu Sep 27, 2012 5:15 pm
- Location: Ashfield Ma
- Has thanked: 13 times
- Been thanked: 18 times
Re: R69 no spark
Ok
54 R51/3, 55 R50/Velorex 560 sidecar, 64 R27, 68 R69US, 75 R75/6
Ashfield, Ma
USA